Banging Boiler Prima F

[bedworth22]

My boiler has begun to make banging noises before tripping out. It has only just started (last few days) and has given me little problems to this point.

History:
HW tank replaced a few months ago by qualified fitter. All rads worked fine. CH thermostat system not always worked properly - refusing to shut down when desired temp. Warm weather has meant that CH not operated - however brief cold snap triggered CH. Problems began.

Boiler tripped out. When reset only rads upstairs worked - downstairs are cold. No apparent air in system when rads bled. Boiler heats for a short while before tripping after loud banging noises.

I know there is little I can do with insufficient skills or knowledge - but I do need plenty of advice/reasons/causes before calling an engineer. I am new to this area and have not yet established any quality engineers and don't fancy being on the end of some cowboy.

 

[ollski]

Suspect your pump has died....can you feel it spinning when the heating is on?

 

[bedworth22]

Thank you for the reply and help but you will have to forgive my ignorance. Do you mean the pump inside the boiler unit? If so then I don't hear any sound